Last reviewed on 12-01-2023
Documentation of California's Greenhouse Gas Inventory
(2023 Edition - Last updated on 12-1-2023)
♦ Category: Energy
IPCC: |
1A3biii - Fuel Combustion Activities - Transport - Road Transportation - Heavy-duty Trucks and Buses |
Sector: |
Transportation : On Road : Heavy-duty Vehicles : Buses |
♦ Activity: Fuel combustion - Gasoline
♦ Greenhouse gas: Carbon dioxide ( CO2 )
► Year 2001 —
● Greenhouse gas emission estimate —
Amount: |
409,598 tonnes of CO2 Emitted (409,598 tonnes CO2 Eq.) |
Basis: |
Calculation |
Calculation: |
[Fuel combustion] * [Heat content] * [Fuel CO2 emission] |
Reference: |
IPCC (2006). 2006 IPCC Guidelines for National Greenhouse Gas Inventories, Prepared by the National Greenhouse Gas Inventories Programme, Eggleston H.S., Buendia L., Miwa K., Ngara T., and Tanabe K. (eds). Volume 2, Chapter 2: Stationary Combustion. Published: IGES, Japan. http://www.ipcc-nggip.iges.or.jp/public/2006gl/pdf/2_Volume2/V2_2_Ch2_Stationary_Combustion.pdf |
● Activity level used in calculations —
● Parameters and Constants used in calculations —
Parameter: |
CO2 emission factor = 0.0709 g / btu |
Reference: |
CARB (2016). Technical support document on GHG inventory methodologies for the 2000-2014 inventory. See Discussion of emissions from on-road transportation available at: https://ww3.arb.ca.gov/cc/inventory/pubs/reports/2000_2014/ghg_inventory_00-14_technical_support_document.pdf |
Parameter: |
EMFAC category fuel combustion = 44,861,142 gal |
Reference: |
CARB (2021). The California Air Resources Board's Emission FACtors (EMFAC) model was used to calculate emission rates from all motor vehicles, such as passenger cars and heavy-duty trucks, operating on highways, freeways, and local roads in California. http://www.arb.ca.gov/msei/msei.htm |
Parameter: |
EMFAC total fuel combustion = 14,365,136,006 gal |
Reference: |
CARB (2021). The California Air Resources Board's Emission FACtors (EMFAC) model was used to calculate emission rates from all motor vehicles, such as passenger cars and heavy-duty trucks, operating on highways, freeways, and local roads in California. http://www.arb.ca.gov/msei/msei.htm |
Parameter: |
Fraction of fuel mix = 0.995 |
Reference: |
CARB (2016). Technical support document on GHG inventory methodologies for the 2000-2014 inventory. See Discussion of emissions from on-road transportation available at: https://ww3.arb.ca.gov/cc/inventory/pubs/reports/2000_2014/ghg_inventory_00-14_technical_support_document.pdf |
Parameter: |
Fuel sales = 14,873,287,328 gal |
Reference: |
Covert T. (2013). Data request between CARB and Theresa Covert, California State Board of Equalization, April 2013. |
Parameter: |
Heat content = 125,000 btu / gal |
Reference: |
USEPA (2012). Mandatory Reporting of Greenhouse Gas Regulation http://www.epa.gov/ghgreporting/ |
● Greenhouse gas emitted per unit activity (derived from values listed above) —
Amount: |
8,865 g (i.e. 8.86 kg) of CO2 per gal of Gasoline |